Wrench.



No. 873,868. PATENTED DEC. 17, 1907.

R. KLEMM.

WREN GE. APPLICATION FILED HAB.16..1907.

EMILE. KLEMM, OEOHICAGO, ILLINO S; f T

WRENCH.

@ masse To all whom it may concern:

Be it known that I, EMIL R. KLEMM, a citi- "zen of the United States of America, and resident of Chicago, Cook county, Illinois, havei nvented a certain new and useful Improvem'ent in Wrenches, of which the following is a' specific ation. j My invention relates to wrenches of that particularty-p'e-or character in which means, suchffo rexam le, asan eccentricde vice, are employedin a dition to a screw for obtaining relative adjustment on the part ofthe jaws, the screw or screw-threaded means being usuallyp'mployed for first adjusting the jaws with respect to a certain size of nutor bolthead, and the eccentric device, or similar meansy'being then actuated for the purpose of giving'the aws a final and very powerful grip on the 'nut or bolt-head.

Generally stated, the object of my invention is to provide an improved and highly efficient wrench'of the foregoin character, and a special object is to provi e an improved constructionand arrangement for relievin the eccentric device, or similar means, of al unnecessary or injurious strain; and another object is toprovide an improved construction. and arrangement whereby an externally threaded rotary member, such as a bolt or a threaded rod, may be employed for adjusting one jaw of the wrench relatively to the other; and it is also an object to provide certain details and features of improvement tending to increase the general efliciency and serviceability of a wrench of this particular character.

I gripping jaw 2.

To the foregoing and other useful ends, my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings, Figure 1 is a side elevation of a wrench embodying the principles-of my invention. Fig. 2 is a back or rear view of the same. Fig. 3 is a sectional view on the line aa in Fig. 2. Fig. 4 is a sectional-view on line bb of Fig. 3. Fig.5 is a sectional view on line c c of Fig. 3. Fig. 6 is a perspective view of the-eccentric in; Fig. ,7 1s a perspective view -of the trave 'ng nut.

As thus illustrated, my invention .com-

rises a shank or bod 1 adapted to serve as a handle, and provide at its upper end with a It will be seen thatthe back of said shank or' body-portion 1 is provided with aguide-way 3, and that this ortion of the shank or body is formed wit straight Specification of Letters, Patent.

surfaces. The adjustable jaw 4 is provided 1907-; ApplicaticniiledMarch16.I907. Serial unease; i

parallel and smooth-front and back and side" I with a hollow portion 5 adapted to fit and slide E upon the said straight upper portion of the shank or body. 1 of the Wrench. A laterally projecting handle 6 is preferably attached to the head rigid with the adjustable-jaw 4, so as to make the wrench more convenient to 2 handle and operate. Also, as illustrated,

the travelingnut 7 is rovided and adapted to slide back and'fort in the guide-way3.

One end of the traveling nut is provided with a threadedbore 8 extending longitudinally I of the nut, and the other end of the said nut is provided with a transverse 0 ening 9.

Relative to this constructionan I ment, the back of the adjustable jaw is. proarrangevided with an opening 10 adapted to receive and, in effect, provide a bearing for the flange or larger diameter of the eccentric pin 11.

The eccentrically formed portion 12 of said pin is adapted to engage and rotate inthe opening 9 of the. said nut. outer end of said eccentric pin is squared to Preferably-the 3 receive a crank handle 14, A screw-bolt 15 extends through the to of the movable jaw 4, and may be screwe down so as to enter within the space 16 between the flange of the eccentric pin 14and the eccentrically formed portion 12, thus locking the pin and crank handle 14 in place. crank 14' is adapted to engage the nut 15, and

The stop 17 on the v thus limit the movement of the crank. A

rotary screw-threaded member, suchas a or socket 8 of t e traveling nut. In order to prevent longitudinal movement of said externally screw-threaded member, its outer end-portion is rovided with an enlargement or collar 19, w ich is confined between the shoulders 23 and 20, and which, also serves as a thumb-piece by which to manually rotate the screw. This member preferably terminates in a rounded end 21, fitting socket 22 in the shoulder 20.. With this construction and arrangement, the movable jaw has an extended bearing on the shank or bodyortion of the wrench, and consequently slides smoothly and is not liable to bind thereon. The eccentric pin 11 consti. tutes the medium of connection by which the rotary screw communicates motion to the movable or adjustable jaw, and is, b reason of said extended bearing surface, re 'eved of all unnecessary and injurious strain. Inasthreaded rod or bolt 18,-is rovided and ar ranged in enga ement with t e threaded bore in the 1 much as the screw iSiOtaIzhbUt not movable gin an endwise direction,

W e the nut is nonrotary and longitudinally adjustable, the

justed Without causin movable jaw is easily and effectively adany portion of the mechanism below the s oulder to move or change its osition in a direction lengthwise of the sha I 'thethreaded .rod "or screw is compelled to 7, Furthermore, no portion, of

slide longitudinally upon andin contact with f some supporting member or portion of the I body.

e jaw 4 can be first adjusted by means of the screw 18, and the final grip on thenut .or bolt-head or other object can be effected by manipulating the-handle 14, it

understood" that this handle can be I used to release th bolt-head. v My improve '15 much simpler in con struction than in of those now in use, and

more efficient, The parts thereof are also so arranged as to-obtain a maximum ofstrength jaw, a hollow mova with a minimum use of material.

' What I claim as my invention is: '1. A wrench com rising a shank and fixed tile jaw, aitravelin nut in operative relation with said, movab e jaw,

.endwise'stationar'y means for bringing said- ,movable jaw into contact with,any article between said jaws, and eccentric means for "tightening the. grip of said movable jaw.

jaw, ahollowmova operat ve relation wt 2. A wrench com rising a shank and fixed tile aw, a travelin nut in said movab e jaw,

endwisestationary means for bringing said movable jawinto'contact with; any' article between said jaws, said means comprising a threaded rodseated in said shank, and eccenv jaw, a hollow mova le 'aw, a tijajvelingl;

I endwise stationary means ionbringing said tricf means for tightening the grip of said movable aw.

' 3. Awrench com rising a shank and fixed nut inv operativev relation wit said niovab e jaw,

movable jaw into contactwith any article etween said jaws, said means tomprising a wrench from'the nut or.

endwise stationary means for bringing said movable jaw into contact with any article between said jaws, said means comprising a threaded rod seated in said shank, and means for tightening the grip of said movable jaw, said means comprising an eccentric in opera- -tive relation with said movable jaw, and a crank bar adapted to give the desired mdtion to said jaw through said eccentric, saideccentric being provided with a peripheral groove, and a set-screw adapted to pass throughthe shank and into said peripheral groove holdingsaid eccentric in p ace.

5. A wrenchcomprising a shank and fixed j aw, a hollow movable j aw, a travelin nut in operative relation with said movab e jaw,

endwise stationary means for bringing said movable jaw into contact with any article between said jaws, said means comprisin a threaded rod'seated in said shank, means or a tightening the grip of said movable jaw, said means comprism an eccentric in operative relation with sal movable aw, a crank bar having a'stop thereon, adapted to give the desired motion to said jaw through said eccentric, said eccentric being provided with a peripheral groove, and a set-screw ada ted to pass through the shank and intosai peri heral roove holding said eccentric in p ace, am? adapted to engage the stop on the crank bar to limit the motion thereof.

Signed by me at Chicago, Illinois, this 27th I day of February, 1907-.

,Witnesses: I

SARAH LEWIS, ALBERT JOHN SAUsnR.

EMIL R, KLEMM. 

